About the business

“Simplex Accounting Services is a UK-based accounting practice supporting freelancers, contractors, startups and small businesses with modern cloud accounting solutions. As FreeAgent specialists, we help businesses manage their finances more efficiently while staying fully compliant with UK tax and Companies House requirements. Our services include bookkeeping, VAT returns, payroll, CIS, year-end accounts, self-assessment tax returns and ongoing business support. By using cloud accounting software such as FreeAgent, we help clients gain real-time visibility over their finances, automate routine processes and simplify day-to-day financial management. We also support business owners with compliance, Companies House filings and general financial administration, allowing them to focus on running and growing their business. At Simplex Accounting Services, our approach is simple provide clear advice, reliable support and practical accounting solutions that help small businesses stay organised, compliant and financially confident.”

The firm's own description, from its FreeAgent partner listing, read 29 August 2026.

On the public record

Started trading13 November 20232 years ago

Company number15281804Private Limited Company, active

Type of businessAccountants

Registered office71-75 Shelton Street, London WC2H 9JQA registered office is not necessarily where the business works from

Latest accountsMade up to 30 November 2025Micro-entity accounts

Next accounts due31 August 2027

Companies House, read 1 August 2026.

Services listed

AccountingBook cleanupBookkeepingBudgeting & forecastingFinancial reportingFreeAgent PayrollFreeAgent setupPayrollSelf-assessment returnsSmall business tax

From its FreeAgent partner listing, read 29 August 2026.

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